stats - Added stats for reserved heap space for consistency

platform/mbed_alloc_wrappers.cpp

@@ -57,6 +57,9 @@ static mbed_stats_heap_t heap_stats = {0, 0, 0, 0, 0};
 void mbed_stats_heap_get(mbed_stats_heap_t *stats)
 {
 #ifdef MBED_HEAP_STATS_ENABLED
+    extern uint32_t mbed_heap_size;
+    heap_stats.reserved_size = mbed_heap_size;
+
     malloc_stats_mutex->lock();
     memcpy(stats, &heap_stats, sizeof(mbed_stats_heap_t));
     malloc_stats_mutex->unlock();

platform/mbed_stats.h

@@ -28,6 +28,7 @@ typedef struct {
     uint32_t current_size;      /**< Bytes allocated currently. */
     uint32_t max_size;          /**< Max bytes allocated at a given time. */
     uint32_t total_size;        /**< Cumulative sum of bytes ever allocated. */
+    uint32_t reserved_size;     /**< Current number of bytes allocated for the heap. */
     uint32_t alloc_cnt;         /**< Current number of allocations. */
     uint32_t alloc_fail_cnt;    /**< Number of failed allocations. */
 } mbed_stats_heap_t;